Type-writing machine.



E. B. HESS.

TYPE WRITING MACHINE.

APPLICATION FILED MAR. 12, 1908.

Patented Nov. 21, 1911.

ATTORNEY WITNESSES.-

.To all whom it may concern:

Q UNITE STATES PATENT OFFICE.

' EDWARD B. HESS, .OF NEW YORK, N. Y ASSIGNOR T0 ROYAL TYPEWRITERCOMPANY,

OF HOBOKEN. NEW JERSEY, A CORPORATION OF N'IEWV JERSEY.

TYPE-WRITING MACHINE.

1 Application filed March 12, 1908. Serial No; 420,551.

Be it known that I, EDWARD B. Hess, 'a

citizen of the United States of America, re-

siding in the boroughof Brooklyn, city and State of New York, haveinvented certain Improvements in 'Type lvriting Machines,

the type bar from position-of rest to the printing point. front strikemachine. The movement is applicable to eitherkey'lever or push pinmachines. t I

In the accompanying drawing, Figure l'is a somewhat diagrammatic view inthe nature of .a vertical longitudinal section showing one of thecentral type bars and its key lever; and Fig. 2, a detail view showingthe type bar actuating means operated by a push pin. i

1 indicates-the platen and 2 any suitable form of type bar segmentlocated below the platen and having pivoted in it type bars thatnormally lie toward the front of the machine. The type bar 3 is pivotedin the segment at 4 and has a heel or projection 5 extendingdownwardlyand rearwardly from the pivot. A spring device is to be used, thereaction of which tends to return the type bar to normal positionagainst thety-pe bar rest 6. Inthis instance, a coiled spring 7 isattached at its front end to the heel of the type bar. Any other form ofspring de- "viceotherwisedocated may of course be used.

Hinged to the heel 5 of the type bar is a link 8 that extends forwardand at its front end is hinged to the upper end of a lever arm 9pivotally connected with the corresponding key-lever 10. Intermediatethe ' may be pivoted at their rear ends.

When the key lever is depressed the arms It is shown applied to a 9, 11,passinto the position shown by dotted lines and during their movementthe type bar is pulled by link 8 to the-printing point with a rapidlyincreasing velocity. 1 In. the particular arrangement shown, the degreesthrough which a type bar will move from position of rest to the printingpoint, are

indicated for each quarter of the downward movement of the finger pieceof the key lever. lVhen the bar has been depressed one fourth of itsstroke, the head of the type bar will have movedthrougheleven degrees;on the next quarter, twelve and one-half degrees; on the third quartereighteen and oneforty-eight degrees. The velocity of the bar adjacentthe printing point both during approachand retreat, is therefore veryhigh .and afi'ords many well known advantages unnecessary to recitehere.

The pivotal connect-ion ofthe rocker arm .11 with lever arm 9 affords amoving fulcrum about which the lever arm swings and bodied in'difi'erentmechanical form by those skilled in the art without departing from thisinvent-ion.

The rear end of the wire forming the spring 7 is extended in a straightline, passes loosely through an aperture in a fixed plate 17 and isprovided in rear of the plate with a head or enlargement 18. The springis only brought into action by its head 18 abutting against the rearface of plate 17 =The relation of the parts'is such that this occurswhen the type bar head is suitably adjacent the printing point, and thespring acts to effect quick retreat of the bar from the platen. Asuitable spring 19 is applied to each type bar.

In Fig. 2 the arm 9 is pivoted to a push pin 20 equipped with a fingerpiece 21 and movable vertically in guide slots in upper and lower keyboard plates 22, 23. rocking arm 11 in this case turns about an axis ina bracket 24 on the under face of plate 22. The reaction spring 25 forthe .push pin is connected to the under side of plate 22 and to aprojection on the side of the push pin, the spring being located be-'half degrees; and on the fourth quarter,

The

the type bar actuating devices is the same as already described.

I claim 1. The combination of a pivot-ed type bar and its verticallymovable operating keyboard member, a leverarm pivoted at one end to saidmember, a link directly connect ing the other end of said lever arm withthe type bar and a rocker arm pivotally connected with the lever armbetween its pointsof connection with the key-board member and with thelink and an axis about which the rocker arm swings.

2. The combination of a pivoted type bar normally lying toward the frontof the machine, its verticallyqnovable operating keyboard member, alever arm pivoted at one end to said member and extending upwardlytherefrom, a link directly connecting the other end of the lever arm andthe heel of the type bar and a rocker arm pivotally connected at itsrear end to the lever arm between its points of connection withvthekey-board member and with the link and a support about which its frontend rocks.

3. The combination of a pivoted type bar normally lying toward the frontof the ma- Copies of this patent may be obtained for five cents each, byaddressing the Washington, .D. G.

chine, its vertically movable operating keyboard member, a lower end onsaid member and extending upwardly therefrom, a link directlyeonnect-ing the upper end of the lever arm with the heel of the type barand a yielding pivot for said lever arm applied intermediate its pointsof connection with the link and with the key-board member.

4. The combination of a pivoted type bar normally lying toward the frontof the machine board member, a lever arm pivoted at its lower end onsaid member and extending upwardly therefrom, a link directly connectingthe upper end of the lever arm with the heel of the type adapted todescribe a circular are for said lever arm applied thereto intermediateits points of connection with the link and with the key-board member. a

In testimony whereof, I have hereunto 50 subscribed my name. J

EDWARD B. HESS Witnesses:

T. O. MYERS, F. C. JOUTRAS.

. Commissioner. of Patents.

lever arm pivoted at its 30 its vertically movable operating key- 40 barand a yielding pivot

